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A140307
Number of n X n binary matrices containing at most four 1's in any 3 X 3 sub-block.
0
1, 2, 16, 256, 15982, 3082378, 1476568000, 2280441045555, 10599616558936358, 140380164790852384033
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..9.
CROSSREFS
Cf.
A139810
.
Sequence in context:
A019318
A090727
A108242
*
A114039
A090305
A358145
Adjacent sequences:
A140304
A140305
A140306
*
A140308
A140309
A140310
KEYWORD
nonn
AUTHOR
R. H. Hardin
, May 27 2008
STATUS
approved
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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)